

The all-in-one Qbank for your USMLE® Step 1 preparation
Integrated high-yield video lectures & up-to-date First Aid® references for all NBME®-style questions
1
Take & review
your Qbank test
Read in-depth explanations and view high-quality illustrations for correct and incorrect answers.

2
Check the First Aid® references & take notes
Use the specific First Aid® page references of each question to review high-yield facts.

3
Learn with integrated video lectures
Effectively review the questions’ concepts with integrated video lectures held by USMLE® experts.

Test our advanced USMLE® Step 1 Qbank for free
A 40-year-old woman is brought to the emergency department by a paramedic team from the scene of a motor vehicle accident. The patient was the vehicle driver at the time of the accident and was restrained by a seat-belt, and was unconscious at the scene. Physical examination reveals multiple injuries involving the trunk and extremities. However, there are no penetrating injuries to the chest. As part of her trauma workup, a CT scan of the chest is ordered. At what vertebral level of the thorax is this image most likely from?
- T4
- T1
- T5
- T6
- T8

A 3-year-old boy goes camping with his parents in the Appalachian mountains of Western North Carolina. While on the hiking trip, he is exposed to an antigen. After the exposure, this antigen is phagocytosed by an antigen-presenting cell (APC), which then travels to a lymph node and presents a peptide via MHC class II to a CD4+ T helper cell. This CD4+ T helper cell then stimulates a B cell, which proliferates and differentiates to produce antibodies to target the antigen. In which of the following numbered sections of the lymph node does this B cell differentiation and proliferation most likely occur?
- 1
- 2
- 3
- 4
- 5


A 40-year-old woman is brought to the emergency department by a paramedic team from the scene of a motor vehicle accident. The patient was the vehicle driver at the time of the accident and was restrained by a seat-belt, and was unconscious at the scene. Physical examination reveals multiple injuries involving the trunk and extremities. However, there are no penetrating injuries to the chest. As part of her trauma workup, a CT scan of the chest is ordered. At what vertebral level of the thorax is this image most likely from?
- Ventricular depolarization
- Period between ventricular depolarization and repolarization
- Ventricular repolarization
- Atrial depolarization
- Atrial repolarization

Get inspired by students who have used Lecturio’s Qbank
for their exam preparation
Survey data from 500,000+ users showed that preparing with Lecturio’s videos, Question Bank, and study guides improved their preparation for clinical training.
reported increased exam confidence
in their preparation for USMLE® Step 1